I need some help with connecting to DNS

https://1.1.1.1/help#eyJpc0NmIjoiTm8iLCJpc0RvdCI6Ik5vIiwiaXNEb2giOiJObyIsInJlc29sdmVySXAtMS4xLjEuMSI6IlllcyIsInJlc29sdmVySXAtMS4wLjAuMSI6IlllcyIsInJlc29sdmVySXAtMjYwNjo0NzAwOjQ3MDA6OjExMTEiOiJObyIsInJlc29sdmVySXAtMjYwNjo0NzAwOjQ3MDA6OjEwMDEiOiJObyIsImRhdGFjZW50ZXJMb2NhdGlvbiI6IlNJTiIsImlzV2FycCI6Ik5vIiwiaXNwTmFtZSI6IkluZG9zYXRtMiIsImlzcEFzbiI6IjQ3OTUifQ==

I’ve followed all the steps and yet it won’t connect to 1.1.1.1 What’s the problem?